BLUMBERG, B. F. <br/><br/>
Business Research Methods. 

 - 4th Ed. 
 - New York,  McGraw Hill,  2014. 
 - xix, 619p.:  ill.;   Glossary & Index  27cm 
<br/><br/><label>ISBN: </label>0-0771-5748-6 
<br/><br/><label>Dewey Class. No.: </label>658.007 BLU